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~~~ <br />State of Colorado Page 2 <br />Mined Land Reclamation <br />August 11, 1978 <br />Later visits to the Slab Canyon quarry wit11 Mr. McCarty <br />and Mr. Funston noted appreciable natural ::evegetation <br />was evident in areas where sandstone overb~irden fines <br />and overburden outslopes have been undistu:^bed for <br />periods of a year or more. This indicates that final <br />grading of the sandstone overburden to red~ice slopes <br />will provide a surface similar to the original that <br />can be easily revegetated. <br />No stockpiles are anticipated in this quarry operation. <br />Limestone will be loaded and hauled from the quarry as <br />needed. Sandstone overburden will be moved downhill <br />into the next lower bench from which limestone has <br />been removed. As stated above, it has been impractical <br />to save any soil. If larger soil pockets .are encoun- <br />tered, they will be moved downhill for final grading <br />over previously placed overburden. <br />B. Mining Timetable-- <br />Limestone from the Slab Canyon quarry is u:>ed in the <br />manufacture of special cements and as nece:;sary to <br />upgrade Boettcher quarry limestone. Annua:L usage has <br />fluctuated between 30,000 and 65,000 tons. The Permit <br />Application for the Boettcher limestone quarry, Exhibit D, <br />introduction and Exhibit D (d) references ~i new grate <br />preheater kiln installation at the Boettcher cement <br />manufacturing plant which is likely to increase or <br />decrease the amount of Slab Canyon limestone needed. <br />Quarry production depends entirely on the requirements <br />of this new type of kiln equipment. A liti:le less than <br />one acre of limestone deposit would be used up per year <br />to remove 50,000 tons. <br />Quarry work at the Slab Canyon quarry in 1!78 has been <br />cleaning up small areas of limestone previously bypassed. <br />It is estimated that operation in 1979 wil:L start at the <br />north end of strip 1, from which overburden was previous- <br />ly removed (Exhibit C map). Removal of overburden down- <br />slope onto previously depleted area will proceed south- <br />ward on strip 1, ahead of the limestone quairry operation. <br />After overburden is removed from strip 1, this operation <br />would progress to north end of strip 2, etc:. The one <br />acre of the previously stripped portion of strip 1 and <br />9 acres of currently undisturbed area woulci last 8-12 <br />years at a 50,000 ton annual rate. <br />